I tried to upgrade my tablet to 4.4.2, i followed the instructions correctly but while it was upgrading i got an error message, it was chinese so i don't know what it said and my tablet turned off and now it won't turn on.I tried to press the power button, no success, i tried to go in recovery mode by pressing the home and power button still no success, i tried to push the reset button with a needle still not working, but when i put it on charge it gets warm and when i connect to pc i get that sound that it has connected so i know it's not broken.